Realize high thermoelectric performance in both zone-melted ingots and powder-metallurgy bulks of Bi0.46Sb1.54Te3

doi:10.1088/1674-1056/add503

Abstract Bi(Sb)$_{2}$Te(Se)$_{3}$ alloys, as the only commercial thermoelectric materials, have been applied widely in cooling fields. While, the current energy conversion efficiency (dominated by the dimensionless ZT) of commercial products is still lower and cannot meet the market demand. In this paper, high thermoelectric performance at room temperature in both zone-melted (ZM) Bi$_{0.46}$Sb$_{1.54}$Te$_{3}$ ingots and powder-metallurgy (PM) Bi$_{0.46}$Sb$_{1.54}$Te$_{3}$ blocks with a large size was realized successfully by optimizing their preparation process. The peak ZT values of ZM and PM p-type Bi$_{0.46}$Sb$_{1.54}$Te$_{3}$ alloys reached 1.26 and 1.45, respectively. They are higher than those of all the n-type or p-type Bi$_{2}$Te$_{3}$-based products in current commercial applications. In particular, their production process of large size p-type Bi$_{0.46}$Sb$_{1.54}$Te$_{3}$ alloys could be directly industrialized.

Keywords: thermoelectric Bi$_{0.46}$Sb$_{1.54}$Te$_{3}$ large size

Received: 19 March 2025
Revised: 25 April 2025
Accepted manuscript online: 07 May 2025

PACS:	72.15.Jf	(Thermoelectric and thermomagnetic effects)
	81.20.Ev	(Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2024YFE0105200), the China Postdoctoral Science Foundation (Grant No. 2023M743151), and the Natural Science Foundation of Henan Province, China (Grant No. 242300420304).

Corresponding Authors: Meng-Yao Li, Meng-Yao Li
E-mail: limengyaorz@zzu.edu.cn;hzsong@zzu.edu.cn

Cite this article:

Kai-Wen Zhao(赵凯雯), Meng-Yao Li(李梦瑶), Ying-Jiu Zhang(张迎九), and Hong-Zhang Song(宋红章) Realize high thermoelectric performance in both zone-melted ingots and powder-metallurgy bulks of Bi_0.46Sb_1.54Te₃ 2025 Chin. Phys. B 34 107203

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Realize high thermoelectric performance in both zone-melted ingots and powder-metallurgy bulks of Bi0.46Sb1.54Te3

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Realize high thermoelectric performance in both zone-melted ingots and powder-metallurgy bulks of Bi_0.46Sb_1.54Te₃